Modular wheelchair base



FIG. 1 is a right side elevation view of a modular wheelchair baseshowing our new design;

FIG. 2 is a top plan view thereof;

FIG. 3 is a left side elevation view thereof;

FIG. 4 is a bottom plan view thereof;

FIG. 5 is a front elevation view thereof; and

FIG. 6 is a rear elevation view thereof.

The ornamental design for a modular wheelchair base, substantially asshown and described.